# SDR HYIA20230901001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 30, 2023
- Submitted: September 1, 2023
- Operation: Air carrier
- Aircraft: [N401SX](https://openairdocs.org/aircraft/N401SX), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0447
- Aircraft time: 24,516 hours, 10,330 cycles
- System (JASC): [5410 · Nacelle/Pylon, Main Frame](https://openairdocs.org/jasc/5410)
- Part: Beam
- Part number: 565410412
- Condition: Cracked
- Location: Zone 400
- Part time: 24,516 hours, 10,330 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20230901001

## Discrepancy

DURING MAINTENANCE A CRACK WAS VISUALLY IDENTIFIED ON THE RIGHT HAND CROSSOVER BEAM (OEM P/N: 5654104-12) OF N401SX (402C0447). THIS CRACK IS LOCATED ON THE AFT FACE OF THE BEAM, COMMON TO THE TOP OUTBOARD BOLT HOLE FOR THE TURBOCHARGER SUPPORT BRACKET. THIS CRACK MEASURES APPROXIMATELY 1 INCH LONG TRAVELING LONGITUDINALLY ACROSS THE FASTENER LOCATION. IT IS CONSISTENT WITH OTHER CRACKS VISUALLY IDENTIFIED IN THIS AREA. THIS BEAM WILL BE REMOVED AND REPLACED.

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